UCSC CMPE 003 - Storage and Multimedia (51 pages)

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Storage and Multimedia



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Storage and Multimedia

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Lecture Notes


Pages:
51
School:
University of California, Santa Cruz
Course:
Cmpe 003 - Personal Computer Concepts

Unformatted text preview:

Computers Tools for an Information Age Chapter 6 Storage and Multimedia The Facts and More Objectives List the benefits of secondary storage Identify and describe storage media that are available for personal computers Differentiate among the principal types of secondary storage Describe how data is stored on a disk Discuss the benefits of multimedia Explain how data is organized accessed and processed 11 23 2003 2 Secondary Storage Separate from the computer itself Software and data stored on a semipermanent basis 11 23 2003 Unlike memory not lost when power is lost 3 Benefit Space Store a roomful of data on disks smaller than the size of a breadbox 11 23 2003 Diskette contains equivalent of 500 printed pages Optical disk can hold equivalent of 500 books 4 Benefit Reliability Data in secondary storage is relatively safe 11 23 2003 Secondary storage is highly reliable More difficult for untrained people to tamper with data stored on disk 5 Benefit Convenience Authorized users can easily and quickly locate data stored on the computer 11 23 2003 6 Benefit Economy Several factors create significant savings in storage costs 11 23 2003 Less expensive to store data on disks than to buy and house filing cabinets Reliable and safe data is less expensive to maintain Greater speed and convenience in filing and retrieving data 7 Magnetic Disk Storage Data represented as magnetized spots on surface of spinning disk Spots on disk converted to electrical impulses Primary types 11 23 2003 Diskettes Hard Disks 8 Diskettes Made of flexible Mylar and coated with iron oxide Has protection of rigid plastic jacket 3 diskette holds 1 44 MB of data High capacity variations 11 23 2003 Sony s HiFD holds 200 MB Imation s SuperDisk available in 120 and 240 MB versions Iomega s Zip drive available in 100 250 and 750 MB versions 9 Hard Disks Rigid platter coated with magnetic oxide Several can be combined into a disk pack Disk drive a device that allows data to be read from or written to a disk



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